Pioneer PDP-4280HD, Service Manual

Page: 5 / 176

PDP-4280HD
5
5 6 7 8
5 6
7
8
C
D
F
A
B
E
CONTENTS
SAFETY INFORMATION ......................................................................................................................................................... 2
1. SERVICE PRECAUTIONS.................................................................................................................................................... 7
1.1 NOTES ON SOLDERING ............................................................................................................................................... 7
1.2 CHARGED SECTION AND HIGH VOLTAGE GENERATING POINT ............................................................................. 8
2. SPECIFICATIONS................................................................................................................................................................. 9
2.1 ACCESSORIES .............................................................................................................................................................. 9
2.2 SPECIFICATIONS ........................................................................................................................................................ 10
2.3 PANEL FACILITIES....................................................................................................................................................... 11
3. BASIC ITEMS FOR SERVICE ............................................................................................................................................ 14
3.1 CHECK POINTS AFTER SERVICING ......................................................................................................................... 14
3.2 QUICK REFERENCE ................................................................................................................................................... 15
3.3 PCB LOCATION ........................................................................................................................................................... 17
3.4 CLEANING ................................................................................................................................................................... 18
4. BLOCK DIAGRAM .............................................................................................................................................................. 20
4.1 OVERALL WIRING DIAGRAM (1/2) ............................................................................................................................. 20
4.2 OVERALL WIRING DIAGRAM (2/2) ............................................................................................................................. 22
4.3 OVERALL BLOCK DIAGRAM (1/2) .............................................................................................................................. 24
4.4 OVERALL BLOCK DIAGRAM (2/2) .............................................................................................................................. 26
4.5 POWER SUPPLY UNIT ................................................................................................................................................ 28
4.6 42 X DRIVE ASSY........................................................................................................................................................ 29
4.7 42 Y DRIVE, 42 SCAN A and B ASSYS....................................................................................................................... 30
4.8 POWER SUPPLY BLOCK of 42 X, Y DRIVE and 42 SCAN A, B ASSYS.................................................................... 31
4.9 42 ADDRESS ASSY..................................................................................................................................................... 32
4.10 42 DIGITAL and SENSOR ASSYS ............................................................................................................................. 33
4.11 MAIN ASSY (DTV BLOCK DIAGRAM)....................................................................................................................... 34
4.12 POWER SUPPLY BLOCK of MAIN ASSY.................................................................................................................. 36
4.13 TANSHI ASSY ............................................................................................................................................................ 38
4.14 42/60LED and 42RLS&IR ASSYS.............................................................................................................................. 39
4.15 POWER SUPPLY BLOCK of 42RLS&IR and SIDE KEY ASSYS............................................................................... 40
5. DIAGNOSIS ........................................................................................................................................................................ 41
5.1 POWER SUPPLY OPERATION.................................................................................................................................... 41
5.1.1 LED DISPLAY INFORMATION............................................................................................................................... 41
5.1.2 POWER ON SEQUENCE ...................................................................................................................................... 42
5.1.3 DETAILS OF POWER ON SEQUENCE................................................................................................................. 43
5.2 DIAGNOSIS FLOWCHART OF FAILURE ANALYSIS .................................................................................................. 45
5.2.1 WHOLE UNIT......................................................................................................................................................... 45
5.2.2 POWER SUPPLY UNIT.......................................................................................................................................... 47
5.2.3 DRIVE ASSY.......................................................................................................................................................... 48
5.2.4 DIGITAL ASSY ....................................................................................................................................................... 52
5.2.5 MAIN ASSY............................................................................................................................................................ 53
5.2.6 VIDEO SYSTEM .................................................................................................................................................... 54
5.2.7 AUDIO SYSTEM .................................................................................................................................................... 60
5.3 DIAGNOSIS OF PD (POWER-DOWN) ........................................................................................................................ 63
5.3.1 BLOCK DIAGRAM OF THE POWER-DOWN SIGNAL .......................................................................................... 63
5.3.2 PD (POWER-DOWN) DIAGNOSIS OF FAILURE ANALYSIS ................................................................................ 64
5.4 DIAGNOSIS OF SD (SHUTDOWN) ............................................................................................................................. 67
5.4.1 BLOCK DIAGRAM OF THE SHUTDOWN SIGNAL ............................................................................................... 67
5.4.2 SD (SHUTDOWN) DIAGNOSIS ............................................................................................................................. 68
5.5 NON-FAILURE INFORMATION .................................................................................................................................... 70
5.5.1 INFORMATION ON SYMPTOMS THAT DO NOT CONSTITUTE FAILURE .......................................................... 70
5.5.2 FUNCTION OF DECREASING THE BRIGHTNESS LEVEL ................................................................................. 73
5.6 OUTLINE OF THE OPERATION .................................................................................................................................. 74
5.6.1 PANEL DRIVE-POWER ON / OFF FUNCTION ..................................................................................................... 74
5.6.2 SPECIFICATION OF THE FAN CONTROL............................................................................................................ 75
5.6.3 PROCESSING IN ABNORMALITY ........................................................................................................................ 76
5.6.4 TRAP SWITCH....................................................................................................................................................... 79